INIC lineup compatible with MOST and ISO21806

The currently released INIC series includes products that support 25Mbps, 50Mbps, and 150Mbps. For in-vehicle systems, it is possible to estimate in advance the type of data to be transferred by the system, the amount of data, etc., so you can select the most suitable product.

Please refer to the table below for the standards, speeds and physical layer media supported by each INIC.

*1 POF: Plastic Optical Fiber
*2 UTP: Unshielded Twisted Pair
*3 STP: Shielded Twisted Pair
*4 COAX: Coaxial

Selecting the optimal INIC according to the transfer data type

The INIC is equipped with not only an interface corresponding to the physical layer on the network side, but also an optimum interface for transferring data to the application side.

With the OS8121x series, it is possible to select the optimum product according to the type of data to be transferred. Audio data and control data can be transferred with all products, but the amount of video data and packet data transferred is large.

Therefore, OS81210 supports USB interface and OS81212 supports MediaLB (3Pin) interface. It is possible to select the optimal product after considering the connectivity with the interface supported by the application processor (SoC), DSP, and microcomputer used in combination.

System configuration example using INIC

So far, we have looked at the standard overview and INIC overview, but this time, let's take a look at the system configuration. An example of system configuration is shown below.

In this configuration, MOST50 (50 Mbps) is used, and basically the data transferred via INIC is control data for inter-ECU control, audio data that realizes inter-ECU audio functions, and packets used for ECU OTA and repro. becomes data.

Decks, digital radio tuners, and external audio amplifiers, which may be regional specifications, user selections or manufacturer options, are arranged independently.

In the system using MOST150 (150Mbps) in the figure below, it is possible to transfer H.264-compressed video data via INIC by utilizing the bandwidth.

In the system configuration example below, in addition to an external audio amplifier that handles audio, an ECU that handles video data is connected. Examples include rear seat entertainment systems, Blu-ray/DVD decks, and TV/digital radio tuners. By transferring not only audio data but also compressed video data via INIC, it is possible to reduce system costs including harnesses.

Assuming each region and option, it is assumed that each ECU can have many specifications even in the same vehicle. Even if such ECUs exist independently, INIC's technology can easily transfer data between ECUs, contributing to system standardization.

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